Promote FDM-DUO to STABLE

rigs/elad/fdm_duo.c

@@ -338,7 +338,7 @@ const struct rig_caps fdm_duo_caps =
     .mfg_name = "ELAD",
     .version = BACKEND_VER ".0",
     .copyright = "LGPL",
-    .status = RIG_STATUS_ALPHA,
+    .status = RIG_STATUS_STABLE,
     .rig_type = RIG_TYPE_TRANSCEIVER,
     .ptt_type = RIG_PTT_RIG_MICDATA,
     .dcd_type = RIG_DCD_RIG,